Air-cooled bicycle motor



Wm, M, 1939,

G. STEINLEIN ET AL.

AIR-COOLED BICYCLE MOTOR Filed Feb. 17, 1938 S P m w m @steslted Nov. M l%@ osstae slelsrele, ltll'einberg, near schedulers, stir-d Elreclsmoser, dcbweinfism, Ger

moms" Febsmary ll, 938, Eevlal No. 1911,0636 (demons Febiearv 11?, 193? it @labms.

relation to motor=blcvcles and to the oi t mounted slsseended ln 7 rd in the the rises way of essmple, represented in the accompanying drawing is which is l is. l e slde elevation of the rear wheel of a bicycle and the title engine mounted thereon, and

' Al en end or heed view of the engine alone.

lllilse ousserels of both figures denote corre soot-idles; pests,

As shown in lt ls. l. the motor is suspended on wheel side or hub so that it depends beneath the bicycle ire it being supported on the ire est reactive straw. "Q 1- the other rte ol the motor: unit are received in a sub- .lwmllv oil-color cosine l the cylinder 8 erolects leterolly from the driving wheel with its heed toting toward in the direction of travel. Cooling ribs ll are disposed on the cylinder lengthwise and soils parallel to the eviindes sills so that the air .xia pass between them, it ls on essential feature oil the invention that the cooling ribs t are inclined downwsrds from the cylinder to their outer edges. thus perttios descending oi the scents which hove been thrown thereon by tile front wheel. The mod chic be deposited upon the uppermost lib if while so e other mm are mlv ovecleoeed by the nest. llc ribs they will be struck only neat" their outer edges. The spaces mtvyeeo time ribs can therefore never be closed eotlcels. its any case every depodt W2: quickly be censored by the mechanical shoots of the motorovels ms was.

lit is not essen tbst the saces of the ribs be plene; on the cone r1 they mes be curved or otherwise shaped. e mere cement is to present oblique (cl. lee) A snarl; plug fixed to cylinder head G is ete= ersblv protected from dirt through a covering a cap t.

As a further object of the invention the uppermost of the ribs E5 is prolonged near t. 1e cssins 9 ol the magneto. This is provided for with the aim of preventing precipitated rain which flows downward on the frame part tram entering and damaging the magneto. Preferably an elevated stop or ledge ill which forms a mouldins leading ed the moisture dovvmvsrds may be loeated at the end of the rib in moxlmltgr of the elelm:

& motor bicycle of the type having a motor v. r:- subetantially horizontal cylinder, mounted on the driving wheel with its center of gravity below the axis of said wheel, spaced substantially paa'allel cooling rlbs on said evils der arranged from the topto the bottom thereof, said ribs being substantially parallel to the cyllnder axis and downwardly inclined from said cylinder away from the plane of said wheel; whereby water, mud, etc, falling on-tlle cooling 4 ribs drain downwardly sway from the cylinder and the wheel.

2. In a motor bicycle oi the type having a. driving wheel, a horizontal gas engine mounted on said wheel with its center oi. gravity below the axis of said wheel, and spaced cooling ribs on said cylinder extending lengthwise thereol. and arranged from the top to the bottom ct said engine, said ribs having their upper surfaces downwardly inclined from said engine away from the plane of said wheel and substantially parsb lel to each other whereby water, mud, eta. fsil= ing on the cooling ribs drain downwardly away from the cylinder and the wheel.

3. In a motor bicycle of the type bsvme e driving wheel, a motor on said wheel with its 5 center of gravity below the axis of sold wheel,

and having a substantially horizontal cylinder. s case enclosed magneto on the rear end oi. said motor and operated therefrom, and sseced cool ing ribs on said cylinder extending length thereof and having their moms surtaces down= wardly inclined from said cylindes and substaw tially oarsllel to each other whereby water, med, etc, falling on the cooling ribs downwardly away from the cylinder and the wheel the uppermost rib g provided st its resr end ab lacent to said magneto with an elongated end portion extending to the casing of said magneto. v to protect said magneto against r.

GTAV 'u| LWIG 

